That's insane (from my North American perspective).

Peanut butter and sweet is the thing peanut butter is used for.

I am actually struggling to find a second example of peanut butter use that I know about that isn't "take something sweet but slap some peanut butter in there too" (I've heard of peanut butter and celery and that just sounds like a desperate way to make raw celery palatable)

Same. I tried it once as a kid and hated it. PB sandwich? Delicious. Toast with jam? Awesome. Put the two together? Nope. I think it was probably a texture issue, but I have no desire to try again now in my 40s.